Doran, J. R. (2010). Breaking the silence: A phenomenological study of the effects of asynchronous voice conferencing on the formation of identity, community and presence in online learning. Dissertation Presented for Philosophy of Doctor in Capella University. Retrieved from www.proquest.com

Fisher, D. M. (2004). Faculty and student perceptions of community and socially constructed knowledge in a virtual learning community. A Dissertation Presented to the Faculty of the school of Human Service Professions, Widener University. Retrieved from www.proquest.com

Hemphill, S. S. (2011). Social constructivist learning, sense of community, and learner satisfaction in asynchronous courses. A Dissertation Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in Capella University. Retrieved from www.proquest.com

Keesee, A. G. (2011). A model for semi-informal online learning communities: A case study of the NASA inspire project. Dissertation Presented for Philosophy of Doctor in Graduate College of the Oklahoma State University. Retrieved from www.proquest.com

Ouzts, K. N. (2003). Social constructivist learning and sense of community in online classes. Dissertation Presented for Doctor of Philosophy in Wyoming University. May 2003. Retrieved from www.ProQuest.com

Wimbish, J. (2001). Listening to the voices of student: The role of student-teacher interaction to course completion in on-line classes. Dissertation Presented for Philosophy of Doctor in Union Institute and University, Cincinnati, Ohio. Retrieved from www.proquest.com